Improvement in door-springs



A. TITTMAN. Door-Springs'.

Patented July l, 1873.

o e o au UNITED STATES PATENT lALnXANDIn-t TITTMAN, oF EvANsvILLE, INDIANA.

IMPROVEMENT IN DOOR-SPRINGS.

Specification forming part of Letters Patent No. 140,446, dated July 1, 1873 application filed May 2o, 1873.

To all whom it may concern:

Be it known that I, ALEXANDER TITTMAN, of Evansville, in the county of Vanderburg and State of Indiana, have invented certain new and useful Improvements in Door-Sprin gs and I do hereby decla-re that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings and to the letters of reference marked thereon, which form apart of this specilication.

The nature of my invention consists in the employment of a spring so arranged in a metal plate that it will operate upon both sides of the door hinged upon said plate, as hereinafter set forth; also, in the combination of the various parts, to be hereafter described.

In order to enable others skilled in the art to which my invention appertains to make and use the same, I will now proceed to describe its construction and operation, referring to the annexed drawing, in which- Figure 1 is a front view, and Fig. 2 a plan view, of a door with my spring attached.

A represents a part of the door-frame, and B a door intended to swing bot-h ways. At the lower end of the door is secured a bar, C, with downward-projecting pin af, which rests in a socket or 'recess on an arm, C', whiclrprojects from the door-frame A, thus forming the lower hinge for the door. At the upper end ot' the frame A is secured a casting, D, provided with a dovetailed tapering groove, into which is inserted metal frame E, that side of said frame which enters the groove being dovetailed and wedgeshaped so as to enter the groove and be held in the same. A bar,

G, is fastened to the upper edge of the door B, yand pivoted by a headed pin or screw, b,

to the upper end of the metal frame E, thus forming the upper hinge for the door. In the metal frame E is inserted a spiral spring, H, and held by means of a central post or rod. The ends of this spring extend horizontally outward on opposite sides of the door, and bea-r against the same, as shown in Fig. 1.

The spring being held in the frame, the tension of the ends is in opposite directions, and, hence, whichever way the door may be opened, 4the spring will bring it back and keep the door closed, even against a very strong draft.

This door-sprin g is very useful on doors for churches, theaters, oices, summer saloon doors, Sac.; and in case the main door is to be used, and the summer-door detached, the whole spring-rigging is taken along with it out of sight.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The spring H attached in the metallic substantially as and for the purposes herein set forth. 1

2. The combination of the casting D having dovetailed tapering groove, the frame E f1therein set forth.

In testimony that I claim the foregoing as my own I aix my signature in presence of two witnesses.

ALEXANDER TITTMAN. Witnesses: 1

JOHN RHEINLANDER, CRAs. MILLER.

frame E, and having its ends operating on op posite sides of a door, B, hinged to said frame,

ting in said groove, the spring H, and hinge!l `bar G, with the door B, all constructed and" arranged substantially as and for the purposes 

